Type-writing machine.



SW. D T N E V W Patented Oct. 27, 1908.

2 SHEETS-SHEET l.

H. H. STE ELI TYPE WRITING MACHINE.

APPLIOATION FILED JULY 22, 1903.

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WITNESSES:

HIS A TEIRNEY H. H. STEELE. TYPE WRITING MACHINE. APPLICATION FILED JULY 22, 1903.

Patented Oct. 27, 1-908.

2 DM v. m T E m N m N g m m N WT w I T WITNESSES:

Teal-L whom "it 1mg concern:

a con-ram, or 1 RsEY'.c1rr-,;{Nnw .lER'fiEYilA; GORronanoN or'Nnw JEasEY.

wa ns;

' Be. it'knowntthat I, H nBEir H;

citizen: ofthe "United .States, and resident of -f Water towli .in the county of Jefferson and v State of New York, have invented certain new, and? useful improvements fiin Type- Writing Machines otwhich the following is at specification.

7 My invention s o "spew-lung machines-and more parti l the line spacin'gmec'hanism of suchimachines. The principal purpose .of my inventloiris to pro vide means for fractional line spacing.

- My invention consists in certainifeatures of construction and combinations "of parts which will be described herein andzparticularly pointed outin; the appended laims;

My invention is illustrated lin -"the acco1nan in drawin s in which:.' P y c Figure 1 is a ongitudinal section through the center of a platen roller having my im rovements. Fig; 2 is anenlargedview simiar to Fig. 1 01 the righthandend of the platen. Figs. 3 4 and 5 are sectional views on the line a:-'--n; of Fig. 2 and showing the parts in difl'erent positions. Fig. 6 is'anend View of the platen roller and line spacing wheel with certain parts whichlcooperate therewith. Fig. 7 is aperspective view'of a locking dog used in my construction. i Y Fig. 8 is a section through the right hand end'of a laten roller showing a lllQdifiCeliiiOIl of my invention. Figk9'is a face View similar to Fi s. 3', .4 and 5,, of a modification."

ihe same parts are designated by the same reference characters in different figures oithe drawings. i

The platen roller consists as usual of a low wooden cylinder l having av rubber sheath 2; At the left hand end there is attached to the rolleranend lece 3 haying integral therewith a sleeve 4 t rough which BX.-

tends a spindle 5 fastened to said sleeve by- ,means of-a pinfi assing through said sleeve and spindle. Said s indle' has at its outer endaifinger wheel 7 laving a hub 8 rigidly fastened to the spindle'fi by means of a set screw 9.

10 represents one of: the end bars of the platen frame ordinarily used in' maehines of this class. y

Atitsright hand end the wooden cylinder 1 is recessed as slwwnnt-lkfind woman the "end? ofsaid recessa circular- I l sp ecifiicati oiioi Letters lat'ent. Applied 31m amymqsi sol-n1 a; iesas.

i ing'at its duced end "14 ofa s indleldhawiing at its to theend; of'said f.cylinder internally toothed gear 20 by means'o'f screws '21 passand' screwed into the woodencylinder.

rubber sheatht h'us leaving an annular space 22 into which projects an annular fianges23 from the lines ace ratchet wheel 24:5. Said thereon or integral therewith an .eccentric26 'teethioffwhich mesh with the teeth oh the gear 20.

wheel 24. The construction is such that the of 1 the wheel 24 but said pinpreven-ts the the gear 27 with32 teeth.

The parts being in the positions shown in shaft turnedby the finger wheel 16in the direction of the arrow in Fig; 3 ,"the ecear 20 butsaid pinion 27 will be prevented lirom rotating by the in 28 .enga 'ngthe side of the slot 29 in w eel 24 whicilispre If a completerotationbe imparted to the shaft 15 the 32 teeth of thezpinion' 27 will have engaged'32 of the teeth ofthe car 20, and sai pinion will havejretlurnefto its prigmal'positi'on shownjin Fig. 3Q In this Patented 05. 27, .1908.

.ing through countersunk holes .inlsaid gearr p The external diameter of the gear 20 is slightly less than the internal diarneter of the".

projects from the sp1 1r"gear- 27 into a radial slot 29 m the inner face of the pin 28 is free tojmovein the slot 29 radially- I have shown the gear zowitheo'te thand vented from rotating by the d,etent roller-31.

center a'hole- 13 to receive the-re outer endla finger wleel lfiizwhose hilb'l7 is 'rig'gi dly fastened to saidspindle'by a set screw "a The-spindle 15 passes through the other end her '19 of the latch frarn e. I-makethe wooden cylinder s ightlyshorterthaniits rub bershe'ath at the'right hand end and fasten line space whee has a hub 25 journaled upon the. spindle 15. The spindle 15' hasiffixed on which. is journaleda spur pinion 27 the} pinion 27 from rotatingonits b'earing2'6 rela I usual pressureroller 32 andplaten s'cale33. i

Figs. 3, and 6, it will beobserved thati f the centric 26 will inovehthe pinion 27 so asto cause the same to roll over the inte'rnal'toothi extent of 8 teeth.

movement the 32nd tooth of the pinion 20 will have been brought to the position occupied in Fig. 3 by the first tooth of said gear so that the gear 20 will have been rotated to the It would thus require 5 complete rotations of the shaft 15 to impart one complete rotation to the gear 20 and the platen roller. The one-fifth rotation of the .wheel 20 caused by one complete rotation of the shaft 15 is not uniformly distributed throughout the whole of the rotation of the shaft '15, owing to the fact that the pinion 27, moving eccentrically as it does, is swung to a certain extent back and forth on the pin 28 as a pivot ;'but this inequality of motion is not important in a mechanism of this description. Fig. 4 shows the parts after the shaft 15 has been'rotated about 90 from the position shown in Fig. 3, and Fig. 5 shows the parts after said shaft has been rotated about 180 from the position shown in Fig. 3." One of the teeth of the gear 20 has been marked with the letter c in these figures, to show its motion. "While the pinion 27-does move about the pin 28 slightly as a pivot, the pin prevents the pinion 27 from making a rotation relative to the wheel 24.

It will be observed'that the mechanism described constitutes a differential ear connection between the platen roller am the line space wheel whereby any degree of motion may be imparted to the platen roller relatively to said wheel. The form of difier'ential gearing which I have described, I shall call a two-piece diflerential gear as only two toothed pieces are employed.

I am aware that other forms of differential gearing have been emplo ed between a platen roller and a line space wheel but the particular' form here described has advantages over any other form of which I am aware. It is highly desirable in such devices that there should be as little freedom of motion or backlash between these two members as possible and every additional element in the gearing that connects them in a fractional line ,space device adds to the amount of back-lash that is possible, especially after the gears have worn to some extent. It will thus be seen 0 that the mere fact that there are but'two gears in this device'is in itself an advantage. urthermore, it will be observed that in a differential gear of this description a large number 'of teeth are in mesh at the same time which lessens the back-lash referred to. Furthermore, the platen roller and line s ace wheel are fre uently subjected to en den jerks and shoe s WhlCh are liable to be injurious to small pinions, and this form of gearenables' me to employ heavier gearing than could be put into the limited 'space available if other forms of differential gear l were used; and also the large number of teeth r in mesh atone time in my construction, adds to its strength. In differential gearing of this description the'impulse of the line space wheel '24 has but little tendency to move the gearing, and the mechanism so far described is capable of being used withoutv further means for preventing motion of the line space wheel relatively to the, platen. I prefer, however, to provide additional means for preventing accidental motion of the parts and for this urpose a plate 3 4 havingha per foration 35 t rough whlch passes the s aft 15 is held rigidly against rotation on said shaft by a rivet 36 passing through the eccentric 26 and a hole 37 in the plate'34. A coiled sp'rin 38 is compressed between the plate 34' and t e disk 12, thus 'ressing the plate 34 against the gear 20. T e shaft 15 has a sufficient endwise play to permit of the pressure of the plate 34 against the gear 20. The

plate 34 may be a smooth late acting on the gear 2O by friction and t us opposing any relative motion of the s indle 15 and the gear 20, and constraining t e parts to move together. I prefer,'however, to form on the normal position in which the parts are held I by the spring 38 the sli6filder40 formed by i the reduced portion- 140f the spindle 15 is slightly removed from the disk"l2' thus giving the spindle a sh ht endwise pla It.will be observed that t e parts are t us normally constrained to move together but by grasping the finger wheel 16 and sliding the spindle 15 inwardly against the tenslon of the" s ring 38 the parts are released and the spine 15 may be rotated and the differential gearing operated to move the platen relatively to the line space wheel.

In case it is desired to dispense with the constraining means above described the modification shown in Fig. 8 may beemployed. Accord' to this modification the platen roller has t e usual shaft 41' having fixed thereto at each end a finger wheel 42.

The shaft 41 is rigidly connected to the roller at its left hand end but at its right hand end is surrounded by a sleeve 43 ournaled on said shaft and having afinger wheel 44 secured thereto by a set screw 45. The

wooden cylinder is made shorterthan the rubber envelop as shown and is rovided withv a disk or head 46 through radiich the shaft 41 passes.- A gear 20 Similar to the gear 20 is fastened to the rollerby screws 21- which also pass through the disk 46 and secure the same to the rolfer. A pinion 27 's journaled on an eccentric 26' rigid with the sleeve 43 and having a pin 28 constrained to.

move in a slot 29' in the line space wheel 24' which is journaled on the sleeve 43,'and has a flange 23- m the space between the gear 20 and the rubber sheath. The operation of this gear isin all respects similar-to that above described and illustrated in Figs. 1 to 5 except-that the spindle employed is here in the form of a sleeve and is turned by an additional finger wheel 44.

In Fig. 9 I have illustrated a modification of my invention in which instead of the ordinary cycloidal gear teeth shown in Figs. 1' to 5, I have shown rounded teeth. By the use of this formthe gears 20 and 27 ma be made of more nearly the same size, an the that illustrated in Fig.

eccentricity of the journal 26 may be less. In Fig. 9 I have shown the gear 20 with 40 teeth and the gear 27" with 36 teeth, so that upon one complete revolution of the shaft the gear would have moved only 4 teeth or one-tenth of a rotation, thus giving a higher multiplication. This form of gearing may be preferable in such'a construction as I am aware that ot er modifications of my invention-'may be made without departing from thespirit thereof.

. The principal uses for which my invention is intended are in connection with the use of a ty 'ewriter for writing on 'rinted blanks or ru ed paper and tor ma ing corrections. The paper is adjusted as near as it may be by means of the pawl 30 anddete'nt roller 31 to the point at which it is desired to write, and the exact adjustment of the paper is then made by turning the finger wheel 16 in a manner that will be clearly understood from the description already given. In case the modification shown in Fig. 8 is used this adjustment may be made with any desired degree of accuracy but in case theform shown in Figs, 1 to 5 is used, the lugs 39 must be inserted 1T1 one or" the other of the spaces between the teeth of the gear 20; but the distance to which the paper would be moved by moving the lugs 39 from one such space to the next is so slight that practically any desiwgable degree of exactness of adjustment may be attained with this form.

What I claim as new and desire to secure by Letters Patent, is:--

1 In a typewriting machine, the combination with a line-space wheel and a latcn which are adapted to maintain a fixer relation when operated, of a two-piece differentizl gear mechanism connecting said wheel and platen; and means for manually o erating said gear mechanism to vary the re ation of said wheel and platen.

2. In a typewrltmg machine, the combina' tion of a platen roller; an internally toothed gear fixed thereto a spindle for said roller, 51.

p1 ion ournaledeccentric-ally on said spindle and meshing with said gear; a line-spacing wheel journalod on said spindle; anda pin and slot connection between said line-spacing wheel and said pinion.

; and the other a line-space whe In a typewriting machine, the combina tion with a line-s ace wheel and a platen roller which are a aptcd to maintain a fixed relation when 0 e rated, of a two-piece differenti'al gear mec anism connecting said wheel and roller; and means for manually operatin said gear mechanism to vary the angular 7 re ation of said wheel and roller.

4. In a typewriting machine, the combination with two members, one a platen roller and the other a line space wheel; of a differential gear connection between said members consisting of a concentric gear, fixed to one of said members, an eccentric gear meshing with said concentric gear; and means connecting the other of said members with said eccentric ear to prevent relative rotation of said mem er and said eccentric gear 5. In a typewriting machine, the combination with two members, one a laten roller cl controlling said roller; of'a differential gear connection between said members consistip of a concentric, internally toothed gear fixed to one of said members, an eccentric spur gear meshing with said concentric gear; and

means to prevent relative rotation of said eccentric gear and the other of said members.

6. In a typewriting machine, the combination'with a spindle and two members; one a platen roller and the other .a. line-space wheel, both mounted concentrically with said spindle; of a difierential gear connection between said members comprising a concentric, internally toothed gear fixed to one of said members, a spur gear eccentrically journaled on said spindle and meshing with said concentric gear; means for preventing relative rotation of said eccentric gear and the other of said members; and manually operable means lor turning said spindle.

7. In a typewriting machine, the combination with a platen roller and a line-space wheel, of a two-piece differential gear connecting said roller and wheel, one piece of said gearing being fast to the roller and the,

other having a pin and slot connection with the wheel.

In a typewriting machine, the combina-i lion witha platen roller and a linerspace' wheel, of a gear fast .to the roller; a second gear having means for causing it to-troll on the first mentioned gear; and means f'or preventing relative rotat-io'n of said second gear and sald wheel.

9. In avtypewriting machine, the combination with, a laten roller. and line-space wheel, of a spindle therefor, normallyturning with said roller and wheel but capable of being turned in said'roller and wheel; and means for varying the angular'relation of said roller and wheel operated by turning the spindle in the roller and wheel,

10. In a typewriting machine, the combirate of sp:

nation or a platen roller having a hollow per-- lion; ziline-space wheel; a spindle r-omrentrio with said roller and. wheel and extena through the line-space wheel into the l10llr' portion and normally turning with said roller and 'lllBGl; and gearing in said hollmr portion for varying the angular relation of the roller and Wheel operated by an independent rotation of said spindle.

i]. In a typowriting machine, the combihntion ol' :1 platen roller having a hollow portion; an internally toothed on. s id roller and in said hollmv portion; a. line wheel e. spindle extending through said lmespace wheel into said hollow port-ion and normally turning with said roller and wheel nd it spur gear ereenuioally journnled on 21 id spindle and connected to said. Wheel; said gearing operated hv iinpzn'ting 2L1) independent lOl ztl-lOll to fill spindle.

12. In a ty11 ewrnn1g machine, the comhi nntion with a plzrien roller h-iiving hollow portion; a line-spam Wheel elosi said hollow portion; and :i spindle extending through said line space Wheel into said hollow portion; said roll r, wheel and spindle normally turning tog-t her; ol means Wthin said hollow portion. or varying the angular relation of said roller and wheel and operated by imparting :1 independent rotary DIUVU- ment to said spindle.

13. in a typowzrrting machine, the combination with n. pl ten. miller having a swindle atone end rigidly cor" ted to said second spindle l'tltie other end oi and ee'pzd'ile of he i. 7 l. of said roller; o'l' line-splice wl el eontroh ling said roller, and means for varying tlr. relation of snidi heel and roller, opern independent rot-at" III of said seoond.

14. In a types-"ailing machine, eoml i nation with Wheel; of :1 for eonnee wheel so that r inger wheel; role-sable means s platen and said linger t ey' .nrn together at the some 2 .d. eonneetions open aid connecting leg the and line space ated by said means are 'l relation of 5 Wheel.

15. In a typewritin; inzwhine, the con nation with s platen roller and a lines w wheel, of gearing 0oz; rooting; said roller wheel whereby the angular relation or he he varied; and a look for in nel "o Stthl ro nlatvn roller and a. line space i lo. In. a typen'riting machine, the eombi- 1m tron with n platen roller and line space wheel, ol l'llQtLl'rSlOl relying the angular releliijinof said. roller and n. ltil; a spindle ha,"- ing at rotor nir-'-' .=.nient rah relation both to the roller 1) l o the Wilt-Ll for opera-ting said means, a .1 .lng el endwise movement; and look Ior said means operated by said endwise lllOVQlTIGHi.

- i typewriting machine, the eornhiplaten roller and a. line space for V:-.Il X"l the angular re- 0 and wheel; a spindle hava rotor ULUVQIHOHL for operating said gearing, and lnwing also ill endnise move went" and u. look for said gearing operated by said. endwise movement.

20. in a. typewriting machine, the combination With a platen roller and a line space wheel, ol g aring for varying the angular relation of said roller and wired; a spindle having a rotary inoven-ient for operating said ginning, and having also an endwise movewent; and a. lock carried by said spindle and n'mved into and out of engagement with said gearing in end'wise movement of said spindle.

. l a typewriti l ment with sand 0 -W1SC movement ol ring and need by endseid spindle. in e typewriting machine, the combination with platen roller and a, line space Wheel, of me dJIllSIH having motion relative both to the platen and to the line space wheel for vznyingftho angular relation of said roller and wheel 21 shaft, the turning of which operates said mechanism; and means normally opposing the operation of said mechanism but released by an endwise movementoi said sh all. Y

In a typewriting machine, the combination with a. platen roller and a line spz I: wheel, of mechanism to r varying the an t relation of said roller and Wheel turning oi which operates said 'i'neelninism; and means spring pressed into engagement- With said mechanism to normally oppose the operation thereof, but released by an endwise movement of said shaft.

In a tynewriting.meehine, the comb? nation of a platen. roller," s spindle for sa d "platen roller which norm ll'ff turns With said plit'mteil'roller but which maybe turned inde- Signed at Wal'lrtown, in the countiy of J efpendently ,of said platen roller; a. line space ferson, and State of New York, this 20th day" Y wheel which normally turns with-said platen of July A. D. 1903.

roller; and means operated by said independ- HERBERT STEELE. 5 'erit rotation of said. spindle for varyin the Witnesses:

relation of said line spacewheel and p aten F. E. STE LE,

roller. M. A. DRURY. 

